INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - CAD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 800	$ 590
Net loss in foreign currency translation adjustments, net of hedging activities	(27)	(336)
Change in derivatives designated as cash flow hedges	2	1
Change in pension and post-retirement defined benefit plans	8	39
Equity accounted investments	3	62
Other comprehensive loss before income taxes	(14)	(234)
Income tax expense on above items	(3)	(36)
Other comprehensive loss (Note 6)	(17)	(270)
Comprehensive income	$ 783	$ 320